A lot of useful information on practically all areas of professional singing distinguish this book: from the basics of voice over handling of audio engineering to marketing and social media. The book is thus very interesting not only for singers, but also for sound engineers, managers and musicians of other instruments, want to better understand the song. Even things that you as a singer might think not once, but they are important to be addressed and explained well. Unfortunately, the section on voice training and vocal care have failed bit thin due diversity of content, here you should acquire additional literature. Nevertheless: Highly recommended!